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lisov135 [29]
3 years ago
15

!!!! Which of the following is a step in evaluating: ∫ cos2 5x dx

Mathematics
1 answer:
elena55 [62]3 years ago
8 0
It follows from the double angle identity for cosine:

\cos^2(5x)=\dfrac{1+\cos2(5x)}2=\dfrac{1+\cos(10x)}2
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Harman [31]
First find the circumference of the circle.
Circumference: 2 \pi r

Plug in 20 for the radius (r).
2 \pi20 = 125.66 

The circumference of the circle is 125.66 cm.
Now to find this in meters... there are 100 centimeters in 1 meter.

Divide 125.66 by 100 to find how many meters this is.
125.66 ÷ 100 = 1.26

The circle's circumference is 1.26 meters.
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4 years ago
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The first week they drank 2 gallons 1quart and 1cup. The second week the drank 3 gallons how much more cups of milk did they dri
stellarik [79]

Answer:

11 cups

Step-by-step explanation:

there are 4 quarts in a gallon

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the second week there was 11 more cups drinking making a total of 48 cups

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3 years ago
Whats 2077-210?<br> its for a thing im doing.
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Step-by-step explanation:

What do you need it for?

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3 years ago
During the period from 1790 to 1930, the US population P(t) (t in years) grew from 3.9 million to 123.2 million. Throughout this
alex41 [277]

Answer:

Step-by-step explanation:

Given that during  the period from 1790 to 1930, the US population P(t) (t in years) grew from 3.9 million to 123.2 million. Throughout this period, P(t) remained close to the solution of the initial value problem.

\frac{dP}{dt} =0.03135P =0.0001489P^2, P(0) = 3.9

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\frac{dP}{0.03135P – 0.0001489P^2 } =dt\\\frac{dP}{-P(0.03135 – 0.0001489P } =dt

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\frac{31.8979}{P} -\frac{0.00474}{0.0001489P-0.03135}

Integrate to get

ln P -0.00474/0.0001489  (ln (0.0001489P-0.03135) = t+C

ln P -31.833  (ln (0.0001489P-0.03135) =t+C

\frac{P}{( ( (0.0001489P-0.03135)^{31.833}  } =Ae^t

Limiting population would be infinity.

6 0
4 years ago
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DedPeter [7]

Answer:

So 452.3 campers will be coming back next year

Step-by-step explanation:

7 0
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